<!-- 角色列表 -->
<template>
  <div class="">
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
            {{ scope.row }}
          </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeUserById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
          
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色的对话框  -->
    <!-- :visible.sync:是否显示对话框,支持 .sync 修饰符 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed()"
    >
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域  -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole()">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑修改角色的对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="60%">
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="80px"
        @close="editDialogClosed()"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo()">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed()"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        :default-expand-all=true
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights()"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  components: {},
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      // 默认选中的节点ID值数组
      defKeys: [],
      //当前即将分配权限的角色id 
      roleId:'',

      // 控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      // 添加角色的表单数据对象
      addForm: {
        roleName: "",
        roleDesc: "",
      },
      // 添加角色的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
        ],
      },
      // 控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      // 根据id查询到的用户信息对象
      editForm: {},
      // 修改表单的验证规则对象
      editFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
        ],
      },
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //   获取所有角色的列表
    getRolesList() {
      this.$http.get("roles").then((res) => {
        if (res.data.meta.status !== 200) {
          return this.$message.error("获取角色列表失败");
        } else {
          this.rolelist = res.data.data;
        }
      });
    },

    // 根据Id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除,消息弹框组价
      // $confirm返回值是promise
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      } else {
        role.children = res.data;
      }
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败");
      } else {
        //把获取到的权限数据保存到data中
        this.rightslist = res.data;
      }
      // 递归获取三级节点的ID
      this.getLeafKeys(role, this.defKeys);
      //获取所有权限的数据
      this.setRightDialogVisible =true;
    },

    // 通过递归的形式，获取角色下所有三级权限的id,并保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含children属性,则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = [];
    },
    // 点击为角色分配权限
    async  allotRights(){
      const keys = [...this.$refs.treeRef.getCheckedKeys(),...this.$refs.treeRef.getHalfCheckedKeys()];
      const idStr = keys.join(',')
      const { data: res } = await  this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
       if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败");
      } else{
        this.$message.success('分配权限成功');
        this.getRolesList();
        this.setRightDialogVisible = false
      }
    }, 

    // 监听添加用户对话框的关闭事件
    // resetFields:对整个表单进行重置，将所有字段值重置为初始值并移除校验结果
    addDialogClosed() {
      this.$refs.addFormRef.resetFields();
    },
    // 点击按钮,添加新角色
    addRole() {
      // validate:对整个表单进行校验的方法，参数为一个回调函数。该回调函数会在校验结束后被调用，并传入两个参数：是否校验成功和未通过校验的字段。若不传入回调函数，则会返回一个 promise
      this.$refs.addFormRef.validate((valid) => {
        if (!valid) {
          return;
        } else {
          // 可以发起添加角色的网络请求
          this.$http.post("roles", this.addForm).then((res) => {
            if (res.data.meta.status !== 201) {
              this.$message.error("添加角色失败");
            } else {
              this.$message.success("添加角色成功");
              this.addDialogVisible = false;
              // 重新获取角色列表数据
              this.getRolesList();
            }
          });
        }
      });
    },

    // 修改角色信息的对话框
    showEditDialog(id) {
      this.$http.get("roles/" + id).then((res) => {
        if (res.data.meta.status !== 200) {
          return this.$message.error("查询用户信息失败");
        } else {
          this.editForm = res.data.data;
        }
      });
      this.editDialogVisible = true;
    },
    // 监听修改对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    // 修改用户信息并提交
    editUserInfo() {
      // 表单预校验
      this.$refs.editFormRef.validate((valid) => {
        console.log(valid);
        if (!valid) {
          console.log(valid);
          return;
        } else {
          // 发起修改用户信息的数据请求
          this.$http
            .put("roles/" + this.editForm.roleId, {
              roleName: this.editForm.roleName,
              roleDesc: this.editForm.roleDesc,
            })
            .then((res) => {
              if (res.data.meta.status !== 200) {
                return this.$message.error("更新用户信息失败");
              } else {
                // 关闭修改用户的对话框
                this.editDialogVisible = false;
                // 重新获取角色列表
                this.getRolesList();
                // 提示修改成功
                this.$message.success("更新用户信息成功!");
              }
            });
        }
      });
    },

    // 根据id删除对应的用户
    async removeUserById(id) {
      // 询问用户是否删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该用户, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      // 如果用户确认删除, 则返回值为字符串 confirm
      // 如果用户取消删除, 则返回值为字符串 cancel
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除!");
      } else {
        const { data: res } = await this.$http.delete(`roles/${id}`);
        if (res.meta.status !== 200) {
          return this.$message.error("删除用户失败!");
        } else {
          // 重新获取用户列表, 来刷新页面
          this.getRolesList();
          return this.$message.success("删除用户成功!");
        }
      }
    },
  },
  computed: {},
  watch: {},
  mounted() {},
};
</script>
<style lang='less' scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>